Brilliant! The Cocoon is a full-day backpack made of ultralight, tear-resistant material. It can be packed extremely small to easily fit inside any pocket. Unfolded, it becomes a highly durable daypack with a 20 litre volume. It can serve as a spare pack on any trip or as shopping bag for your groceries, replacing polluting plastic bags. The Cocoon has one compartment and a double slider coil zip for easy handling.